203204234135603 has 4 divisors (see below), whose sum is σ = 205068493164480. Its totient is φ = 201339975106728.

The previous prime is 203204234135561. The next prime is 203204234135671. The reversal of 203204234135603 is 306531432402302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 203204234135603 - 2⁸ = 203204234135347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203204234135003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 932129514275 + ... + 932129514492.

It is an arithmetic number, because the mean of its divisors is an integer number (51267123291120).

Almost surely, 2^{203204234135603} is an apocalyptic number.

203204234135603 is a deficient number, since it is larger than the sum of its proper divisors (1864259028877).

203204234135603 is a wasteful number, since it uses less digits than its factorization.

203204234135603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1864259028876.

The product of its (nonzero) digits is 311040, while the sum is 38.

Adding to 203204234135603 its reverse (306531432402302), we get a palindrome (509735666537905).

The spelling of 203204234135603 in words is "two hundred three trillion, two hundred four billion, two hundred thirty-four million, one hundred thirty-five thousand, six hundred three".